Origin, prevention and treatment of orchid cancer virus and matters needing attention in replenishing water with edible fungi.

According to the literature records in Hualien District of Taiwan, there are at least 25 viruses infecting orchids, belonging to 9 virus groups. Orchid mosaic virus, orchid ringspot virus and orchid small spot virus are the most common. The disease is an incurable virus in the near future, and contains transmission, heredity, orchid friends called orchid "cancer" and "AIDS".

After the orchid strain is infected with the virus, it causes systemic infection, which causes the orchid plant to grow slowly, leaves with spots or irregular sunken yellow discoloured patches, and sometimes gangrenous spots. Generally, it often occurs at the base, middle or end of the leaf, showing milky white length and thickness, different states and irregular boundaries, the boundary of the spot is often like a gradually diffused water stain, and both sides of the spot are green-like and transparent. There are no different color spots in the early stage, and there is a concave feeling on the back of the middle stage, including a little light brown, middle spot, late color deepening such as sunburn, wrinkle lines at the same time, the edge of the leaf curls and loses its luster, then gradually dried up and finally died. The terrible Bellas virus is contagious and can be passed on to the next generation of orchid strains. Although it does not get sick in time, it is like early cancer. The bite, crawling, friction and extrusion of pots, substrates and leaves of pests, display, stacking, transportation, soaking and water supply of orchid seedlings together, and the reuse of old plant materials may spread Bayas virus, especially when the plants in spring and autumn change pots, the knives used, such as scissors, must contain diseased plant juice when cutting diseased orchid seedlings, and when cutting other orchid seedlings again. It turns out that the virus stained with the juice on the tool can be infected by the wound into the cell. the frequent use of knives in the spring and autumn season often makes the virus spread rapidly in the orchid garden, some orchid courts use three-dimensional arrangement, when watering the upper orchid seedlings, the water left behind will flow to the lower layer and along with the virus in the root will also spread with the water, although the infection in this way is slow, but its influence can not be ignored. In addition, orchids grow in rural areas and garden farms, because other crops and tobacco, sweet peppers, peppers, red beans, peas, flowers in Tang Changyi, lily infected with the Bayas virus (CMT), through aphid vector transmission can not be ignored. As the prevention and treatment of the virus cannot be prevented by drugs, only by strengthening the diagnosis and prevention of the virus can the occurrence of the virus be prevented. Usually, the following prevention work should be done:

1. Do not blindly pursue varieties, do not buy virus orchid seedlings cheaply, especially do not buy orchid seedlings in viral orchid endemic areas, and do not buy seedlings mixed with diseased seedlings, which is the most effective control method.

2. Newly purchased orchid seedlings must be carefully checked to see if they are poisonous before entering the garden.

Before entering the garden, we all need to use "virus Bike" 500Mel 700 times solution, add 250x edible rice vinegar solution to soak it for 2 hours, in order to disinfect, after putting on the basin, use "virus Bike" diluent to spray the leaf surface and leaf back once, every 10ml 15 days with this solution to irrigate the root, each for more than 10 times, and then choose medical aspirin 1000 times solution to spray once every season, so as to inhibit the proliferation and spread of the virus.

3. Do not reuse the same cutting tool, use a high temperature flame treatment tool if necessary, or soak in 10% bleach or 2% formalin for 60 minutes to disinfect. It is best to prepare several knives for exchange and put them into the disinfectant immediately after use, just like medical scissors in the disinfectant at any time. When ramets, their hands should also be disinfected by disinfectant.

4. Do not insist on high reproduction rate and high growth rate and excessively high temperature and humidity management, the cultivation of orchid seedlings should not be too dense, the orchid garden must pass through the natural wind, all kinds of fertilizers should be supplied due to demand, and do not apply fertilizer blindly, in case it is counterproductive. The orchid garden permitted by the site had better be cultivated naturally, and high temperature and humidity is the main cause of virus damage.

5. Prevent the occurrence of insects in the garden, especially aphids.

6. If pollen is planted, do not take orchids as the male parent.

Although Bellas virus is an incurable disease, it is not absolutely incurable. The methods are summarized as follows:

First, build up a strong physique. Put the diseased orchid in the place of natural wind, adjust the light temperature and humidity, create good ecological conditions, and suitable for fertilizer supply and spraying, grow strong plants, and improve the ability of anti-virus.

Second, drug treatment: 1, finished pesticide virus, Bike 500 times liquid as effective medicine, adding 250 times solution of edible rice vinegar with strong osmotic function to introduce medicine directly to the disease department; 2, applying heat-clearing and detoxifying traditional Chinese medicine: Radix Isatidis, Flos Lonicerae, Scutellaria baicalensis, Yi Jiexi, Zhizi, Qiye and one flower, etc., choose the combination of 3rel and 5 clocks, and use alternately every month. First, use the leaching solution as the shearing liquid, and finally use the residue to sprinkle the solution with 10-100x liquid; 3. Spray 1000 times of the analgesic aspirin once a season, spraying and spraying both the above ground part and the underground part, omni-directional treatment of spraying once every 7 days, once every 10 words for 15 days, and then once a month or once a month for a year to consolidate the effect.

Third, support the upright and dispel evil, gradually increase the amount of light, more natural wind, more shower dew, normal fertilization, once every half a year, in line with 2 trace element fertilizer and plant biotics, spray medium concentration foliar fertilizer once a month, such as plant power 2003, Gaoli, Gaole, Ashi brand foliar fertilizer.

If we make unremitting efforts according to this method, we can get a short-term cure effect.